1.

If \[{{7}^{2a-b}}=\text{ }70\times 30+15\times 20+1\]then find the value of  \[{{\left( \frac{2a}{4+b} \right)}^{-212}}\].

A. -212                
B.  -1          
C. 1      
D. 0
E. None of these
Answer» D. 0


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